MAGETWO-49956: Store Selector for Product Page

- CI builds stabilization;

Author: Alex Akimov

app/code/Magento/Catalog/Test/Unit/Model/ProductRepositoryTest.php

@@ -256,7 +256,9 @@ protected function setUp()
             ->setMethods([])
             ->getMockForAbstractClass();
         $storeMock->expects($this->any())->method('getWebsiteId')->willReturn('1');
+        $storeMock->expects($this->any())->method('getCode')->willReturn(\Magento\Store\Model\Store::ADMIN_CODE);
         $this->storeManagerMock->expects($this->any())->method('getStore')->willReturn($storeMock);
+        $this->storeManagerMock->expects($this->any())->method('getWebsites')->willReturn([1 => 'default']);
 
         $this->mediaGalleryProcessor = $this->getMock(
             'Magento\Catalog\Model\Product\Gallery\Processor',